Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1382e7d9fa41e95…

MALICIOUS

PDF

77.5 KB Created: 2021-04-29 17:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31614558214aaa9fc609c8a9f861897e SHA-1: 26a14806a0019a3f5ae75a88c6ca1ad97dcadebc SHA-256: a1382e7d9fa41e955b048e1b74875ce946b075db442fce6d3fafe1733aec5270
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised WordPress upload storage, suggesting an attempt to host malicious content or redirect users. The document body, though heavily obfuscated, contains keywords related to a 'bulletproof diet roadmap', likely a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/24ca8b9d21352209947374146293fbe1/11574218749.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf649935e---66205865176.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160818ed73fdf5---72619717517.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/trn22c1njdq6o0n7p7ikqbfneg/jezoliniduvinasumiverole.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/64892dcae737c801c8794cdc7ec348ff/miseparakinutujuzotoxol.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/45525253779.pdf
    • http://aeronautike.com/userfiles/file/kuragetuzemupones.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083974e2b517---javenediwufebopajutufu.pdf
    • http://ankaser.com/userfiles/file/wovimoxizuzadevimek.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/c80j4pr0ngmprrj04abvvf9342/19548706534.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/deuhppsfii86au7e6m5bvt02mk/muguzadebugi.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/b31b87529e1a9c28ab7c669e918f124c/tixatemisu.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/1vnpuboof9cnesbfoia7glviuo/kuziwafogoremedaret.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/hb90nov6c2kqu9b3ejr6h5b4r7/97176148812.pdf
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081218339ff6---40975209892.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/rgujqn2ivmajnsdob93dsmbpq5/koduxegivavugife.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=bulletproof+diet+roadmap
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e522.bin
811a89266e10af3dfcab6fede891951a74b7ce4208ff384f8ea04b11221c7b91
pdf-font-stream PDF embedded font (sfnt) at offset 0xE522 4832 bytes
font_01_sfnt_off0000f594.bin
62f49ad824375c4611175cbfc14c9f78032c3af8b6c5f7376e10b83f763aa029
pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 11056 bytes
font_02_sfnt_off00011b2d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2D 4324 bytes